Malicious PDF — malware analysis report

Static analysis result for SHA-256 482a54e3030c1623…

MALICIOUS

PDF

83.3 KB Created: 2021-06-29 14:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 40c4140743f440b0f82163c6d7610d58 SHA-1: 725a4cfb0929fc0cd301578b7a3671c7e4eab250 SHA-256: 482a54e3030c1623383dea334d8ac0d9509c922e9fd45fc7c7a668ad8ba9f04f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to host or distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b926cedfc---vikemujekodigibumiruga.pdf In PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/sufematunifixiv.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/94590578434.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/pebigo.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/daninosofawarunumaxus.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc660d398---14982160998.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/732d35be4c1a83dbba7c94b871e718b3/19171086818.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/490fc5280a8333ad5c48197f9a60b1e2/68928488124.pdfIn PDF document text
    • http://qytbearing.com/upfile/file/juronobifotibazababor.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/birosugatakexufatuxi.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/31850766081.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501142543529031.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3b06196db---19599642178.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/bubufifejos.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/83777185991.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/7fa3bc75311fe8fc4202aca855b850db/41440436330.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/tozevegal.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/81063970627.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/50523987751.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/73941103290.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/f7fd89c2595cbd0d8452b3350bbe63db/lidonegalojerux.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/85931179664.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/26234388777.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160722f3a881ce---zosodunazesodumixejamen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=cry+cry+cry+songPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10020 bytes
SHA-256: f4dbd4ce0eaacead8502fa73aca176ccf9dbef4125e7182501eed9c2b503a27a
font_01_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 17232 bytes
SHA-256: 6e8d8d6e9d10c7efa9735dbd81568430e821c9f62b45f756bb2ed080d438311c
font_02_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1